Citation: Naixu Li, Bin Yang, Ming Liu, Yong Chen, Jiancheng Zhou. Synergetic photo-epoxidation of propylene with molecular oxygen over bimetallic Au–Ag/TS-1 photocatalysts[J]. Chinese Journal of Catalysis, ;2017, 38(5): 831-844. doi: 10.1016/S1872-2067(17)62832-8 shu

Synergetic photo-epoxidation of propylene with molecular oxygen over bimetallic Au–Ag/TS-1 photocatalysts

Naixu Li ^a, ,
Bin Yang ^a ,
Ming Liu ^a ,
Yong Chen ^a ,
Jiancheng Zhou ^a,b,c

a. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, Jiangsu, China;
b. Department of Chemical and Pharmaceutical Engineering, Southeast University Chengxian College, Nanjing 210088, Jiangsu, China;
c. Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, Southeast University, Nanjing 211189, Jiangsu, China

Received Date: 2 January 2017
Revised Date: 1 April 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (21576050) and the Natural Science Foundation of Jiangsu Province (BK20150604).

Au–Ag bimetallic nanoparticle-supported microporous titanium silicalite-1 catalysts were prepared via a hydrothermal-immersion method, and their structures were examined. These materials serve as efficient catalysts for the photosynthesis of propylene oxide via the epoxidation of propene. The Au/Ag mass ratio and reaction temperature were demonstrated to have significant effects on the catalytic activity and selectivity of propylene oxide. The optimal formation rate (68.3 μmol/g·h) and selectivity (52.3%) toward propylene oxide were achieved with an Au:Ag mass ratio of 4:1. Notably, the strong synergistic effect between Au and Ag resulted in superior photocatalysis of the bimetallic systems compared with those of the individual systems. A probable reaction mechanism was proposed based on the theoretical and experimental results.
- Gold,
- Silver,
- Titanium silicalite-1,
- Photocatalysis,
- Propene epoxidation,
- Synergetic effect
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